Sharpening-machine.



H. MUNSON.

SHARPENING MACHINE.

APPLICATION FILED OCT. 23. 1914.

Patented Apr. 25, 1916.

Mimi-1555 A TTURNEYE.

HARRY MUNSON, OF BUFFALO-, NEW YORK.

SHAR-PIENING-MAGHINE.

Specification of Letters Patent.

Patented Apr. 25, 1916..

Application filed October 23,1914. Serial No.868 236i To all whomz't may concern:

Be it known that I, HARRY MUNsoN, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in SharpeningsMachines, of which the following: is a specification:

This invention relates to a sharpening machine which is more particularly designed for sharpening? the edges of razor blades such as are now commonly used in safety razors, although the machine may also be used for sharpening other articles.

Itisthe object of this invention to provide a machine for this purpose which is simple, durable and inexpensive in-construction, which permits of first rough sharpening or honing. the blade or other article to be sharpened and then stropping or fine sharpening the edge of this blade or other article, and also to provide reliable and effective means for carrying away the dust produced during the honing operation so as to prevent the same from getting. on to the surface of the strop or into the surrounding atmosphere where the same would not only be objectionable so far as cleanliness is concerned but: also to injure the health of the operator.

In the accompanying drawings: Figure 1 isastop plan view of my'improved sharpening. machine. Fig. 2 is a vertical section of the same taken on line 22, Fig.1. Fig. 3 is ahorizontal section taken on line 33, Fig. 2, looking upwardly. Fig. 4 is a fragmentary elevation of the dust guard Wall and one of the fan blades or wings mounted thereon. Fig. 5 is a perspective view of the fan disk arranged on the underside of the hone.

Similar characters of reference indicate corresponding parts throughout the several views.

1 represents the floor of a room or other support and 2 a table, bracket or the like arranged at a distance above the floor.

3 represents an upright shaft journaled at its lower end in a bearing 4 on the floor and having its upper part projecting through an opening in the table and ournaled in a bearing 5 secured to the underside of this table. The upper part 6 of this shaft above the table is reduced in diameter so as to form an upwardly facing shoulder 7 thereon. Upon the upper part of the shaft is mounted a spider which preferably comprises-a central hub 8 which rests upon the shoulder 7, a plurality of arms 9projecting outwardly fronr this hub and forming a plurality of verticalpassageways 10 between these-arms,-andan annular shelf 11 arranged at the outer ends of said' arms. The hub arms and shelf of the'spider-are preferably formed integrally by casting the same of metal, although, if desired, they may be otherwise constructed; The hub 8 may be secured to thereduced part of the shaft by means'of a' set screw 12, as shown in- Fig; 1 or by any'other suitable 'means. Upon the shelf is mounted an annular or ring-shaped strop 13 which is preferably constructed of leather or other smooth'ening or fine sharpening material which presents a flat upper surface:

14 represents a sleeve or collar mounted on the reduced upper part of the shaft and engaging with the upper end of the spider hub. Above the upper end of this sleeveafan disk-15 is-mounted on the reduced part of the shaft which disk is pro videdw-ith a plurality of fan blades 16 arranged in a circularrow around the shaft and at its periphery this disk is provided with a downwardly projecting annular flange 17. Above the fan disk a hone :18 of carborundum or similar grinding or abrasive material is mounted on: the reduced part of the shaft and caused to turn withthe sameand the fan'disk, spider and strop by means'of a screw nut or cap 19, seoured"to' the upper end of the reduced part of the shaft and bearing against the upper side 'of' thehone. The hone is preferably arranged in a'somewhathigher plane than the strop;

20represents an upright annular guard wall mounted on the spider adjacent to theinner edge of the strop and preferably formed integrally therewith, as shown in Fig. 2. The inner edge of the strop and the guard wall are separated by an intervening annular space from the periphery of the hone, and the guard wall projects at its upper and lower edges above and below the hone, as shown in Fig. 2. On its inner side the guard wall is provided with a plurality of fan blades or wings 21.

During the operation of sharpening a razor blade the same is first honed or rough sharpened by holding the same in engagement with the upper surface of the hone While the latter is being rotated With the shaft. After the 'honing'operation the razor blade is engaged with the upper surface of the annular strop for a sufficient length of time to put a fine edge on the blade. While the blade is held in engagement with the h ne a fine dust is produced by the abrading a tion of the hone against the blade. In the 3 sence of any provision to prevent it this ust would be thrown outwardly by centrifugal force upon the surface of the strop and the adjacent part of the table and also 'into the surrounding atmosphere which would not only be uncleanly but also unhealthy and interfere with the proper action of the strop. The scattering of this dust is, however, prevented byv the guard wall which intercepts the dust as the same is thrown'out by centrifugal force and prevents the same from passing upon or over the strop. The rotation of the spider causes its arms to produce a downward suction of air through the space between the hone and the strop, so that the dust generated by the hone is drawn downwardly. This movement of the dust is aided by the action of the fan blades on the inner side of the guard wall and the fan blades of the fan disk on Y the underside of the hone, whereby the dust is forcibly withdrawn and discharged in a downward direction. In order to permit of conveniently collecting the dust thus generated and disposing of the same readily a catch pan or basin is provided underneath the hone and strop which pan is preferably constructed of two sections 22, 22 and removably mounted on the hub of the spider by dividing the sections of this pan on a diametrical line extending through the axis wheel 26 which engages with a friction 1 of power, it has no delicate parts which are liable to get out of order, and it permits of quickly honing and stropping razor blades or the like without interference from the dust which is generated during the honing operation.

I claim as my invention:

1. A sharpening machine comprising an upright rotatable shaft, a circular hone mounted on the upper end of said shaft, a spider mounted 011 said shaft below said hone, an annular strop mounted on the peripheral part of said spider and separated by an intervening space from said hone, an annular upright wall arranged 011 said spider adjacent to the inner edge of said strop, and fan blades arranged on the inner side of said wall.

2. A sharpening machine comprising an upright rotatable shaft having its upper part reduced to form an upwardly facing shoulder, a spider having a hub resting on said shoulderand secured to said shaft, arms projecting outwardly from said hub and an annular shelf arranged at the outer ends of said arms, a sleeve arranged on said hub, a fan disk arranged on said shaft above said sleeve and provided with fan blades, a hone arranged on said shaft above said fan disk, a screw nut arranged on said shaft above said hone, an annular strop arranged on said shelf, an annular upright guard wall mounted on said spider adjacent to the inner edge of said strop, and fan blades arranged on the inner side of said guard wall.

Vitness my hand this 21st day of October, 1914..

HARRY MUNSON.

Witnesses:

JAMES K. ALLERTON, TnEo. L. Porr.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents,

Washington, D. G. i 

